68419398657 has 8 divisors (see below), whose sum is σ = 91311688384. Its totient is φ = 45570020688.

The previous prime is 68419398643. The next prime is 68419398667. The reversal of 68419398657 is 75689391486.

68419398657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68419398657 - 2¹¹ = 68419396609 is a prime.

It is a super-2 number, since 2×68419398657² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68419398667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10724218 + ... + 10730595.

It is an arithmetic number, because the mean of its divisors is an integer number (11413961048).

Almost surely, 2^68419398657 is an apocalyptic number.

It is an amenable number.

68419398657 is a deficient number, since it is larger than the sum of its proper divisors (22892289727).

68419398657 is a wasteful number, since it uses less digits than its factorization.

68419398657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21455879.

The product of its digits is 78382080, while the sum is 66.

The spelling of 68419398657 in words is "sixty-eight billion, four hundred nineteen million, three hundred ninety-eight thousand, six hundred fifty-seven".